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I've solved it on my own this way: - ticket_value is calculated with an expression, but I set the increment type and reset type to the same group (`order_number`) - the TextField that contains the `ticket_value` variable has an evaluation time set to the group `order_number`, and it is positioned in the group footer - i've created another variable `partial_ticket_sum` that sums the variable `ticket_value`, with initial value set to 0.0, increment type set to `order_number` group and reset type set to`region_id` group - the TextField that contains the `partial_ticket_sum`has an evaluation time set to `order_number` group

In my report produced with Tibco Jaspersoft 6.3 I am facing a strange issue. I have a datasource as follows: order_number - fiscal code - price - region_id records can have the same order_number, as follows: 1 - xxyyzz - 10$ - 001 1 - mmnnxx - 5$ - 001 2 - kkhhff - 6$ - 001 3 - ppookk - 7$ - 001 1 - aayyzz - 10$ - 002 2 - llnnxx - 5$ - 002 2 - oohhff - 6$ - 002 2 - vvookk - 7$ - 002 for each group of records with the same `order_number`, I have a variable that calculates a value called `ticket_value` with an expression. This calculation works correctly, I see the right values for each `order_number`. I have sum variables for `price` and `ticket_value` based on region. I've created two groups, one for the `region_id` and one for `order_number`. I perform the calculation of the single `ticket_value` in footer of `order_number` group and the sums of prices and `ticket_values` for each region in the region_id footer. The price sum value is correct for each `region_id`, but I don't have the correct value of the sum of `ticket_value` for each `region_id` and I don't understand where is the error in the variables configuration. Here is the definition of variables used: <variable name="ticket_somma_numero_ordine" class="java.lang.Double" resetType="Group" resetGroup="Gruppo_NUMERO_ORDINE"> <variableExpression><![CDATA[$V{totale_importo_numero_ordine}.compareTo(new BigDecimal(36.15)) > 0 ? 36.15 : $V{totale_importo_numero_ordine}.doubleValue()]]></variableExpression> </variable> <variable name="sommatoria_ticket" class="java.lang.Double" resetType="Group" resetGroup="Gruppo_REGIONE" incrementType="Group" incrementGroup="Gruppo_NUMERO_ORDINE"> <variableExpression><![CDATA[$V{sommatoria_ticket} + $V{ticket_somma_numero_ordine}]]></variableExpression> <initialValueExpression><![CDATA[0.0]]></initialValueExpression> </variable> *EDIT:* I've noticed that the sum variable `sommatoria_ticket` is wrong with this logic: looking at data example above, there are two records with `order_number` = 1 for the `region_id` = 1; in that case the value of `sommatoria_ticket` is doubled; if the records are 3, the value is x3... It seems that the `ticket_value` calculation is shown just once per subgroup but it is taken for each row of the subgroup when the `sommatoria_ticket` variable is calculated. I've tried to change increment type and reset type of variables, and also the evaluation time of the text fields, but the issue is not solved